Head shot

As nasty as it sounds, for a translation I just need to know what the word is for the shooting into head of an executed person after being shot by the fire squad. Is it a head shot? Or there is a military jargon for it?

Monkey, like most mass nouns, it depends on how you're using it. Usually, it is uncountable and used in the singular. While we're at it, so is "usage". You should have said: "...this site is where English usage is scrutinized..."

Is "jargon" a uncountable noun? I was taught that "jargon" is and was corrected in this usage by my English teacher. Since this site is where English usages are scrutinized, I am just puzzled and raise my question. I am not being picky...I really want to know the answer from native speakers.